US7333480B1 - Localization of call routing for TDM sets in an IP network - Google Patents

Localization of call routing for TDM sets in an IP network Download PDF

Info

Publication number
US7333480B1
US7333480B1 US10/945,148 US94514804A US7333480B1 US 7333480 B1 US7333480 B1 US 7333480B1 US 94514804 A US94514804 A US 94514804A US 7333480 B1 US7333480 B1 US 7333480B1
Authority
US
United States
Prior art keywords
call
network
routing
gateway
media gateway
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US10/945,148
Inventor
Gwen Clarke
Cuthbert Cheung
Peter Tarle
Percy Lau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arlington Technologies LLC
Avaya Management LP
Original Assignee
Nortel Networks Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nortel Networks Ltd filed Critical Nortel Networks Ltd
Priority to US10/945,148 priority Critical patent/US7333480B1/en
Assigned to NORTEL NETWORKS LIMITED reassignment NORTEL NETWORKS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHEUNG, CUTHBERT, CLARKE, GWEN, LAU, PERCY, TARIE, PETER
Assigned to NORTEL NETWORKS LIMITED reassignment NORTEL NETWORKS LIMITED RE-RECORD TO CORRECT THE ASSIGNOR NAME PREVIOUSLY RECORDED AT REEL/FRAME 015818/0049 Assignors: CHEUNG, CUTHBERT, CLARKE, GWEN, LAU, PERCY, TARLE, PETER
Application granted granted Critical
Publication of US7333480B1 publication Critical patent/US7333480B1/en
Assigned to CITIBANK, N.A., AS ADMINISTRATIVE AGENT reassignment CITIBANK, N.A., AS ADMINISTRATIVE AGENT SECURITY AGREEMENT Assignors: AVAYA INC.
Assigned to CITICORP USA, INC., AS ADMINISTRATIVE AGENT reassignment CITICORP USA, INC., AS ADMINISTRATIVE AGENT SECURITY AGREEMENT Assignors: AVAYA INC.
Assigned to AVAYA INC. reassignment AVAYA INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NORTEL NETWORKS LIMITED
Assigned to BANK OF NEW YORK MELLON TRUST, NA, AS NOTES COLLATERAL AGENT, THE reassignment BANK OF NEW YORK MELLON TRUST, NA, AS NOTES COLLATERAL AGENT, THE SECURITY AGREEMENT Assignors: AVAYA INC., A DELAWARE CORPORATION
Assigned to BANK OF NEW YORK MELLON TRUST COMPANY, N.A., THE reassignment BANK OF NEW YORK MELLON TRUST COMPANY, N.A., THE SECURITY AGREEMENT Assignors: AVAYA, INC.
Assigned to CITIBANK, N.A., AS ADMINISTRATIVE AGENT reassignment CITIBANK, N.A., AS ADMINISTRATIVE AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AVAYA INC., AVAYA INTEGRATED CABINET SOLUTIONS INC., OCTEL COMMUNICATIONS CORPORATION, VPNET TECHNOLOGIES, INC.
Assigned to AVAYA INC. reassignment AVAYA INC. BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 023892/0500 Assignors: CITIBANK, N.A.
Assigned to AVAYA INC. reassignment AVAYA INC. BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 025863/0535 Assignors: THE BANK OF NEW YORK MELLON TRUST, NA
Assigned to AVAYA INTEGRATED CABINET SOLUTIONS INC., OCTEL COMMUNICATIONS LLC (FORMERLY KNOWN AS OCTEL COMMUNICATIONS CORPORATION), AVAYA INC., VPNET TECHNOLOGIES, INC. reassignment AVAYA INTEGRATED CABINET SOLUTIONS INC. BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 041576/0001 Assignors: CITIBANK, N.A.
Assigned to AVAYA INC. reassignment AVAYA INC. BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 030083/0639 Assignors: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
Assigned to GOLDMAN SACHS BANK USA, AS COLLATERAL AGENT reassignment GOLDMAN SACHS BANK USA, AS COLLATERAL AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AVAYA INC., AVAYA INTEGRATED CABINET SOLUTIONS LLC, OCTEL COMMUNICATIONS LLC, VPNET TECHNOLOGIES, INC., ZANG, INC.
Assigned to SIERRA HOLDINGS CORP., AVAYA, INC. reassignment SIERRA HOLDINGS CORP. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITICORP USA, INC.
Assigned to CITIBANK, N.A., AS COLLATERAL AGENT reassignment CITIBANK, N.A., AS COLLATERAL AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AVAYA INC., AVAYA INTEGRATED CABINET SOLUTIONS LLC, OCTEL COMMUNICATIONS LLC, VPNET TECHNOLOGIES, INC., ZANG, INC.
Assigned to WILMINGTON TRUST, NATIONAL ASSOCIATION reassignment WILMINGTON TRUST, NATIONAL ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AVAYA INC., AVAYA INTEGRATED CABINET SOLUTIONS LLC, AVAYA MANAGEMENT L.P., INTELLISIST, INC.
Assigned to WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT reassignment WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT INTELLECTUAL PROPERTY SECURITY AGREEMENT Assignors: AVAYA CABINET SOLUTIONS LLC, AVAYA INC., AVAYA MANAGEMENT L.P., INTELLISIST, INC.
Assigned to AVAYA INTEGRATED CABINET SOLUTIONS LLC, AVAYA INC., AVAYA MANAGEMENT L.P., AVAYA HOLDINGS CORP. reassignment AVAYA INTEGRATED CABINET SOLUTIONS LLC RELEASE OF SECURITY INTEREST IN PATENTS AT REEL 45124/FRAME 0026 Assignors: CITIBANK, N.A., AS COLLATERAL AGENT
Assigned to WILMINGTON SAVINGS FUND SOCIETY, FSB [COLLATERAL AGENT] reassignment WILMINGTON SAVINGS FUND SOCIETY, FSB [COLLATERAL AGENT] INTELLECTUAL PROPERTY SECURITY AGREEMENT Assignors: AVAYA INC., AVAYA MANAGEMENT L.P., INTELLISIST, INC., KNOAHSOFT INC.
Assigned to CITIBANK, N.A., AS COLLATERAL AGENT reassignment CITIBANK, N.A., AS COLLATERAL AGENT INTELLECTUAL PROPERTY SECURITY AGREEMENT Assignors: AVAYA INC., AVAYA MANAGEMENT L.P., INTELLISIST, INC.
Assigned to AVAYA INTEGRATED CABINET SOLUTIONS LLC, AVAYA INC., INTELLISIST, INC., AVAYA MANAGEMENT L.P. reassignment AVAYA INTEGRATED CABINET SOLUTIONS LLC RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 53955/0436) Assignors: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
Assigned to AVAYA INTEGRATED CABINET SOLUTIONS LLC, AVAYA INC., INTELLISIST, INC., AVAYA MANAGEMENT L.P. reassignment AVAYA INTEGRATED CABINET SOLUTIONS LLC RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 61087/0386) Assignors: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
Assigned to CAAS TECHNOLOGIES, LLC, HYPERQUALITY II, LLC, AVAYA INTEGRATED CABINET SOLUTIONS LLC, AVAYA INC., HYPERQUALITY, INC., OCTEL COMMUNICATIONS LLC, VPNET TECHNOLOGIES, INC., AVAYA MANAGEMENT L.P., ZANG, INC. (FORMER NAME OF AVAYA CLOUD INC.), INTELLISIST, INC. reassignment CAAS TECHNOLOGIES, LLC RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001) Assignors: GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT
Assigned to AVAYA LLC reassignment AVAYA LLC (SECURITY INTEREST) GRANTOR'S NAME CHANGE Assignors: AVAYA INC.
Assigned to AVAYA LLC, AVAYA MANAGEMENT L.P. reassignment AVAYA LLC INTELLECTUAL PROPERTY RELEASE AND REASSIGNMENT Assignors: CITIBANK, N.A.
Assigned to AVAYA LLC, AVAYA MANAGEMENT L.P. reassignment AVAYA LLC INTELLECTUAL PROPERTY RELEASE AND REASSIGNMENT Assignors: WILMINGTON SAVINGS FUND SOCIETY, FSB
Assigned to ARLINGTON TECHNOLOGIES, LLC reassignment ARLINGTON TECHNOLOGIES, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AVAYA LLC
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Definitions

  • This invention relates to call routing and, in particular, to localization of call routing for time-division multiplexed (TDM) phones in an IP network.
  • TDM time-division multiplexed
  • IP networks Modern telecommunications networks often employ IP networks to route data and voice traffic.
  • an IP network for serving a number of users may be distributed over a wide geographic area, such that users are not necessarily in the same city, state, or even country. All of the voice call traffic may be routed and managed by a central call server in the IP network.
  • the central call server may be in a different physical location from many of the terminals connecting to the IP network.
  • Edge gateways connect the IP network to the PSTN, allowing calls originating in the IP network to reach termination points in the PSTN, and vice versa.
  • IP network includes IP media gateways (IPMG) for connecting TDM sets to the network.
  • IPMG IP media gateways
  • the central call server manages the routing of calls from the IPMG to termination points.
  • an ESA call is placed over a physical circuit from a TDM phone to a private or public branch exchange or switch.
  • the switch or exchange recognizes the nature of the ESA call, e.g. an E911 call in North America, and routes the call to the local public service answering point (PSAP).
  • PSAP public service answering point
  • the TDM phone, the exchange or switch, and the PSAP are all co-located in the same general geographic area. Accordingly, a user calling 911 is assured of reaching a PSAP in his or her general area.
  • a difficulty that arises with ESA calls in an IP network configuration is that the central call server and the edge gateways may be located in different geographic regions from the user of the TDM set that places an ESA call. Accordingly, if the central call server simply routes an ESA call to an edge gateway, the call will enter the PSTN at a geographic location that may bear no relation to the geographic location of the caller. As a result the caller may be connected with a PSAP in a different city, state, or even country.
  • a TDM set may place a call to a PSTN location within the local area code of the TDM set, i.e. a local call.
  • the central call server may be located in another area code, i.e. in another city or state or country.
  • the call from the TDM set may enter the PSTN at a location that would render the call a long-distance call through PSTN circuits.
  • the present application describes a system and method for routing calls from TDM sets in an IP network to a geographically appropriate area of the PSTN.
  • a call is routed to an edge gateway in a geographic location corresponding to the geographic location of the IPMG to which the TDM set is connected.
  • Each IPMG is associated with a geographic zone.
  • Each geographic zone is also associated with at least one edge gateway. Accordingly, an incoming call may be routed by the central call server based upon the geographic zone associated with the IPMG receiving the call, and is routed to an edge gateway associated with the identified geographic zone.
  • the present application provides a method of routing a call request from a time-division multiplexed (TDM) set, the TDM set being connected to an IP network through an IP media gateway, the IP network including a central call server for controlling the IP media gateway and routing calls in the IP network, the IP network including a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN).
  • the method includes steps of receiving a signalling message at the central call server from the IP media gateway, the signalling message identifying a call from the TDM set, identifying a geographic zone associated with the IP media gateway, selecting one of the edge gateways based upon the geographic zone, and sending the IP media gateway routing information for routing the call to the selected edge gateway.
  • TDM time-division multiplexed
  • the present application provides a system for routing a call request from a time-domain multiplexed (TDM) set through an IP network, the IP network including a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN).
  • the system includes an IP media gateway connected to the TDM set and providing an interface to the IP network, and a central call server for controlling the IP media gateway and routing calls in the IP network.
  • the central call server includes an input for receiving a signalling message from the IP media gateway, the signalling message identifying a call from the TDM set.
  • the central call server includes a component for identifying a geographic zone associated with the IP media gateway, a component for selecting one of the edge gateways based upon the geographic zone, and a component for sending routing information to the IP media gateway for routing the call to the selected edge gateway.
  • the present application provides a central call server for routing a call request from a time-division multiplexed (TDM) set through an IP network, wherein the IP network includes a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN) and the IP network includes an IP media gateway connected to the TDM set and providing an interface to the IP network.
  • the central call server includes an input for receiving a signalling message from the IP media gateway, wherein the signalling message identifies a call from the TDM set.
  • the central call server also includes a component for identifying a geographic zone associated with the IP media gateway, a component for selecting one of the edge gateways based upon the geographic zone, and a component for sending routing information to the IP media gateway for routing the call to the selected edge gateway.
  • FIG. 1 diagrammatically shows a telecommunications system, including an IP network and a public switched telephone network;
  • FIG. 2 shows, in flowchart form, a method of routing a call from a TDM set in an IP network.
  • embodiments of the invention described below are directed to the routing of emergency service access calls to an appropriate public service access point in the public switched telephone network, it will be appreciated that the present application is not limited to such embodiments.
  • the routing of certain calls based upon the geographic location of the IP media gateway and/or TDM set is applicable in a wider range of scenarios. For example, a call from a TDM set to a PSTN phone terminal within the local geographic calling area of the PSTN may be purposely routed to enter the PSTN through an edge gateway in the geographic region of the IP media gateway so as to avoid establishing the call as a long-distance call across area codes.
  • the method and system described below may also have application in other scenarios for routing calls.
  • FIG. 1 diagrammatically shows a telecommunications system 10 including an IP network 12 and a public switched telephone network (PSTN) 14 .
  • Edge gateways 16 (shown individually as 16 a , 16 b , and 16 c ) couple the IP network 12 to various different points of the PSTN 14 .
  • the PSTN 14 and the IP network 12 may be spread over a broad geographic region and may be located in more than one city, state and/or country. Accordingly, the edge gateways 16 may be located in different geographic regions. For example, a first edge gateway 16 a may be located in one city, while a second edge gateway 16 b may be located in another city.
  • a central call server (CCS) 18 is located within the IP network 12 .
  • the central call server 18 controls a number of IP media gateways (IPMGs) 20 (shown individually as 20 a , 20 b , and 20 c ).
  • IPMGs 20 each couple a plurality of devices to the IP network 12 .
  • the IPMGs 20 provide an interface for digital or analog devices to connect to the IP network 12 .
  • An IPMG 20 typically connects a number of TDM sets 22 to the IP network 12 and is co-located with the TDM sets 22 in a common physical location. For example, in a business setting, an office may contain an IPMG 20 and a number of TDM sets 22 , with each TDM set 22 being directly wired to the IPMG 20 .
  • An office location may contain more than one IPMG 20 .
  • a large office may include an IPMG 20 for each floor or multiple IPMGs 20 for each floor if the number of users is sufficiently large or dispersed.
  • the TDM sets 22 may include traditional digital or analog telephone sets.
  • An enterprise may include a number of IPMGs 20 for interfacing a large number of TDM sets 22 , all controlled by the central call server 18 .
  • the central call server 18 need not be located in the same geographic area as each IPMG 20 .
  • the central call server 18 uses the IP network 12 and IP messaging to interact with and control the IPMGs 20 .
  • the central call server 18 may provide a number of centralized control functions or applications, including call management and routing, voice mail applications, interactive voice response (IVR) applications, recorded announcement (RAN) applications, music-on-hold (MOH) applications, and other applications.
  • the central call server 18 provides routing for calls originating from a TDM set 22 connected to one of the IPMGs 20 .
  • the corresponding IPMG 20 to which the TDM set 22 is wired passes signalling information onto the central call server 18 , including the number dialed by the user.
  • the central call server 18 manages the set-up and routing of the call, including set-up of an IP trunk 36 .
  • the central call server 18 sends the IPMG 20 routing information specifying the IP trunk 36 on which the IPMG 20 is to send media packets.
  • This information may include an edge gateway 16 to connect the call to the PSTN 14 if the call is intended for a termination point external to the IP network 12 .
  • Signalling and control communications continue to pass through the central call server 18 .
  • Those of ordinary skill in the art will be familiar with the roles and functions of the IPMGs 20 and the central call server 18 in setting-up and managing calls.
  • the central call server 18 includes a routing component 24 for receiving signalling information from the IPMGs 20 regarding outgoing call requests, and for determining the routing information.
  • the routing component 24 may interact with a routing database 26 containing routing data to enable the routing component 24 to determine appropriate routing instructions. Routing instructions are communicated to an IPMG 20 by the central call server 18 over the IP network 12 .
  • the routing component 24 may be made of up of a number of subcomponents for implementing its functions. It may be implemented by way of a suitably programmed processor operating under program control. Those of ordinary skill in the art will appreciate the possible mechanisms for implementing the routing component(s) 24 to provide for the functions of identifying, selecting, and routing described below.
  • the central call server 18 is located in the same geographic area as one or more of the IPMGs 20 , with additional IPMGs 20 in remote locations.
  • the main office may contain the central call server 18 and a number of IPMGs 20 .
  • a number of other IPMGs 20 may be located in branch offices elsewhere on the enterprise campus, elsewhere in the city, or even in other states or countries.
  • the IP network 12 interconnects the remote IPMGs 20 and the central call server 18 at the main office location.
  • the PSTN 14 includes a number of public service answering points (PSAP) 30 (shown individually as 30 a and 30 b ).
  • PSAP public service answering points
  • Switches 32 (shown individually as 32 a and 32 b ) within the PSTN 14 recognize incoming emergency service calls and are configured to route those calls to an associated PSAP 30 .
  • a switch 32 routes an emergency service call to a designated PSAP 30 located in the same geographic location as the switch 32 .
  • an emergency call is placed within the PSTN 14 , it first reaches a switch 32 in the general geographic area from where the call originated.
  • the call is first terminated at a local branch exchange where the call is recognized by the exchange as an emergency 911 call and is routed or connected to the local PSAP 30 . Accordingly, the caller is routed to a local PSAP 30 which will be appropriately equipped to respond to the emergency call.
  • the routing of emergency calls to an appropriate PSAP 30 poses a difficulty.
  • the caller is not necessarily in the same location as the central call server 18 . Accordingly, if the central call server 18 routes an emergency call to an edge gateway 16 in its local area, the PSAP 30 reached in the PSTN 14 may not be an appropriate PSAP 30 for the caller. In some cases, the PSAP 30 may be located in a different city or country from the caller.
  • the central call server 18 needs to be able to route an emergency service request to an appropriate region of the PSTN 14 in order for the call to reach an appropriate PSAP 30 . Accordingly, the central call server 18 associates each IPMG 20 with a geographic area or zone 34 (shown individually as 34 a and 34 b ). Each geographic zone 34 may include more than one IPMG 20 . Similarly, the central call server 18 associates each geographic zone 34 with one or more edge gateways 16 . The associations between IPMGs 20 and their corresponding geographic zones 34 may be stored as routing data in the routing database 26 .
  • the central call server 18 When an emergency call is placed by one of the TDM sets 22 , the central call server 18 recognizes the nature of the call and the routing component 24 determines the geographic zone 34 associated with the IPMG 20 to which the TDM set 22 is connected. Based on the identified geographic zone 34 the central call server 18 selects an edge gateway 16 to which the call will be routed in order to reach the PSTN 14 . It communicates the routing instructions to the IPMG 20 and the call is routed to the appropriate edge gateway 16 and into the PSTN 14 . Once in the PSTN 14 it reaches a switch 32 and is routed to the local PSAP 30 .
  • a geographic zone 34 is associated with more than one edge gateway 16 , then the routing component 24 selects one of the edge gateways 16 . The selection may be based upon a number of factors including quality-of-service assessments, load balancing, or other network considerations.
  • a geographic zone 34 may have more than one edge gateway 16 so as to provide a zone of the IP network 12 with redundant connections to the PSTN 14 for reliability and quality-of-service reasons. Accordingly, if one of the edge gateways 16 is off-line, the central call server 18 may direct the emergency call to the other edge gateway 16 .
  • FIG. 2 shows, in flowchart form, a method 100 of routing calls from TDM sets in an IP network.
  • the method 100 begins in step 102 wherein an IPMG receives an ESA call from a TDM set.
  • the IPMG passes the call signalling to a central call server in step 104 .
  • the central call server recognizes, typically based upon the digits dialed, i.e. 911, that it has received a request for emergency services from a TDM set. Accordingly, the central call server determines the geographic zone or region associated with the IPMG from which it received the call signalling. It may do so by consulting a stored set of associations in a routing database. Based upon the identity of the IPMG, the central call server is able to determine its associated geographic zone.
  • the central call server uses the determined geographic zone to select an appropriate edge gateway connecting the IP network to the PSTN.
  • the central call server may select the edge gateway from more than one appropriate candidate edge gateways. It may also test the status or loading of the candidate edge gateways to ensure that the identified edge gateway is capable to handling the ESA call and connecting the user with the PSTN.
  • the central call server performs the functions necessary to set-up an IP trunk between the IPMG and the selected edge gateway.
  • the IPMG is provided with routing instructions to enable it to send media packets to the edge gateway directly.
  • the central call server sends call signalling information through the selected edge gateway into the PSTN in order to set-up a circuit for the call.
  • the PSTN receives the call signalling at a local switch and routes the call to the local PSAP in step 114 .
  • the call set-up is complete and the IPMG sends media to the selected edge gateway and through to the local PSAP. The user is thus connected with his or her local PSAP in order to receive appropriate emergency services.

Abstract

A system and method for routing calls from a time-division multiplexed (TDM) sets in an IP network to a geographically appropriate portion of the public switched telephone network (PSTN). A call is routed to an edge gateway in a geographic location corresponding to the geographic location of an IP media gateway to which the TDM set is connected. Each IP media gateway is associated with a geographic zone. Each geographic zone is also associated with at least one edge gateway. Accordingly, incoming calls are routed by the central call server based upon the geographic zone associated with the IP media gateway receiving the call, and are routed to an edge gateway associated with the identified geographic zone. The system and method may be applied to route emergency service access calls to an appropriate portion of the PSTN so that they arrive at a geographically appropriate public service answering point (PSAP).

Description

FIELD OF THE APPLICATION
This invention relates to call routing and, in particular, to localization of call routing for time-division multiplexed (TDM) phones in an IP network.
BACKGROUND OF THE INVENTION
Modern telecommunications networks often employ IP networks to route data and voice traffic. In many situations, an IP network for serving a number of users may be distributed over a wide geographic area, such that users are not necessarily in the same city, state, or even country. All of the voice call traffic may be routed and managed by a central call server in the IP network. The central call server may be in a different physical location from many of the terminals connecting to the IP network. Edge gateways connect the IP network to the PSTN, allowing calls originating in the IP network to reach termination points in the PSTN, and vice versa.
Traditional TDM sets, i.e. digital and analog sets that are not IP-enabled, are still used even in the context of IP networks for telephony. The IP network includes IP media gateways (IPMG) for connecting TDM sets to the network. The central call server manages the routing of calls from the IPMG to termination points.
In some circumstances, it would be desirable to base the call routing on the location of the TDM set.
For example, in the traditional public-switched telephone network (PSTN), an ESA call is placed over a physical circuit from a TDM phone to a private or public branch exchange or switch. The switch or exchange recognizes the nature of the ESA call, e.g. an E911 call in North America, and routes the call to the local public service answering point (PSAP). The TDM phone, the exchange or switch, and the PSAP are all co-located in the same general geographic area. Accordingly, a user calling 911 is assured of reaching a PSAP in his or her general area.
A difficulty that arises with ESA calls in an IP network configuration is that the central call server and the edge gateways may be located in different geographic regions from the user of the TDM set that places an ESA call. Accordingly, if the central call server simply routes an ESA call to an edge gateway, the call will enter the PSTN at a geographic location that may bear no relation to the geographic location of the caller. As a result the caller may be connected with a PSAP in a different city, state, or even country.
In another example, a TDM set may place a call to a PSTN location within the local area code of the TDM set, i.e. a local call. In some circumstances, the central call server may be located in another area code, i.e. in another city or state or country. As a result, the call from the TDM set may enter the PSTN at a location that would render the call a long-distance call through PSTN circuits.
SUMMARY OF THE APPLICATION
The present application describes a system and method for routing calls from TDM sets in an IP network to a geographically appropriate area of the PSTN. A call is routed to an edge gateway in a geographic location corresponding to the geographic location of the IPMG to which the TDM set is connected. Each IPMG is associated with a geographic zone. Each geographic zone is also associated with at least one edge gateway. Accordingly, an incoming call may be routed by the central call server based upon the geographic zone associated with the IPMG receiving the call, and is routed to an edge gateway associated with the identified geographic zone.
In one aspect, the present application provides a method of routing a call request from a time-division multiplexed (TDM) set, the TDM set being connected to an IP network through an IP media gateway, the IP network including a central call server for controlling the IP media gateway and routing calls in the IP network, the IP network including a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN). The method includes steps of receiving a signalling message at the central call server from the IP media gateway, the signalling message identifying a call from the TDM set, identifying a geographic zone associated with the IP media gateway, selecting one of the edge gateways based upon the geographic zone, and sending the IP media gateway routing information for routing the call to the selected edge gateway.
In a further aspect, the present application provides a system for routing a call request from a time-domain multiplexed (TDM) set through an IP network, the IP network including a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN). The system includes an IP media gateway connected to the TDM set and providing an interface to the IP network, and a central call server for controlling the IP media gateway and routing calls in the IP network. The central call server includes an input for receiving a signalling message from the IP media gateway, the signalling message identifying a call from the TDM set. The central call server includes a component for identifying a geographic zone associated with the IP media gateway, a component for selecting one of the edge gateways based upon the geographic zone, and a component for sending routing information to the IP media gateway for routing the call to the selected edge gateway.
In another aspect, the present application provides a central call server for routing a call request from a time-division multiplexed (TDM) set through an IP network, wherein the IP network includes a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN) and the IP network includes an IP media gateway connected to the TDM set and providing an interface to the IP network. The central call server includes an input for receiving a signalling message from the IP media gateway, wherein the signalling message identifies a call from the TDM set. The central call server also includes a component for identifying a geographic zone associated with the IP media gateway, a component for selecting one of the edge gateways based upon the geographic zone, and a component for sending routing information to the IP media gateway for routing the call to the selected edge gateway.
Other aspects and features of the present application will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments in conjunction with the accompanying figures.
BRIEF DESCRIPTION OF THE DRAWINGS
Reference will now be made, by way of example, to the accompanying drawings which show an embodiment of the present application, and in which:
FIG. 1 diagrammatically shows a telecommunications system, including an IP network and a public switched telephone network; and
FIG. 2 shows, in flowchart form, a method of routing a call from a TDM set in an IP network.
Similar reference numerals are used in the figures to denote similar components.
DESCRIPTION OF SPECIFIC EMBODIMENTS
Although embodiments of the invention described below are directed to the routing of emergency service access calls to an appropriate public service access point in the public switched telephone network, it will be appreciated that the present application is not limited to such embodiments. The routing of certain calls based upon the geographic location of the IP media gateway and/or TDM set is applicable in a wider range of scenarios. For example, a call from a TDM set to a PSTN phone terminal within the local geographic calling area of the PSTN may be purposely routed to enter the PSTN through an edge gateway in the geographic region of the IP media gateway so as to avoid establishing the call as a long-distance call across area codes. The method and system described below may also have application in other scenarios for routing calls.
Reference is first made to FIG. 1, which diagrammatically shows a telecommunications system 10 including an IP network 12 and a public switched telephone network (PSTN) 14. Edge gateways 16 (shown individually as 16 a, 16 b, and 16 c) couple the IP network 12 to various different points of the PSTN 14. The PSTN 14 and the IP network 12 may be spread over a broad geographic region and may be located in more than one city, state and/or country. Accordingly, the edge gateways 16 may be located in different geographic regions. For example, a first edge gateway 16 a may be located in one city, while a second edge gateway 16 b may be located in another city.
A central call server (CCS) 18 is located within the IP network 12. The central call server 18 controls a number of IP media gateways (IPMGs) 20 (shown individually as 20 a, 20 b, and 20 c). The IPMGs 20 each couple a plurality of devices to the IP network 12. The IPMGs 20 provide an interface for digital or analog devices to connect to the IP network 12. An IPMG 20 typically connects a number of TDM sets 22 to the IP network 12 and is co-located with the TDM sets 22 in a common physical location. For example, in a business setting, an office may contain an IPMG 20 and a number of TDM sets 22, with each TDM set 22 being directly wired to the IPMG 20. An office location may contain more than one IPMG 20. For example, a large office may include an IPMG 20 for each floor or multiple IPMGs 20 for each floor if the number of users is sufficiently large or dispersed. The TDM sets 22 may include traditional digital or analog telephone sets.
An enterprise may include a number of IPMGs 20 for interfacing a large number of TDM sets 22, all controlled by the central call server 18. The central call server 18 need not be located in the same geographic area as each IPMG 20. The central call server 18 uses the IP network 12 and IP messaging to interact with and control the IPMGs 20. The central call server 18 may provide a number of centralized control functions or applications, including call management and routing, voice mail applications, interactive voice response (IVR) applications, recorded announcement (RAN) applications, music-on-hold (MOH) applications, and other applications. In particular, the central call server 18 provides routing for calls originating from a TDM set 22 connected to one of the IPMGs 20. When a user originates a call using one of the TDM sets 22, the corresponding IPMG 20 to which the TDM set 22 is wired passes signalling information onto the central call server 18, including the number dialed by the user. The central call server 18 manages the set-up and routing of the call, including set-up of an IP trunk 36. In particular the central call server 18 sends the IPMG 20 routing information specifying the IP trunk 36 on which the IPMG 20 is to send media packets. This information may include an edge gateway 16 to connect the call to the PSTN 14 if the call is intended for a termination point external to the IP network 12. Signalling and control communications continue to pass through the central call server 18. Those of ordinary skill in the art will be familiar with the roles and functions of the IPMGs 20 and the central call server 18 in setting-up and managing calls.
The central call server 18 includes a routing component 24 for receiving signalling information from the IPMGs 20 regarding outgoing call requests, and for determining the routing information. The routing component 24 may interact with a routing database 26 containing routing data to enable the routing component 24 to determine appropriate routing instructions. Routing instructions are communicated to an IPMG 20 by the central call server 18 over the IP network 12. The routing component 24 may be made of up of a number of subcomponents for implementing its functions. It may be implemented by way of a suitably programmed processor operating under program control. Those of ordinary skill in the art will appreciate the possible mechanisms for implementing the routing component(s) 24 to provide for the functions of identifying, selecting, and routing described below.
In one embodiment, the central call server 18 is located in the same geographic area as one or more of the IPMGs 20, with additional IPMGs 20 in remote locations. For example, in an enterprise setting, the main office may contain the central call server 18 and a number of IPMGs 20. A number of other IPMGs 20 may be located in branch offices elsewhere on the enterprise campus, elsewhere in the city, or even in other states or countries. The IP network 12 interconnects the remote IPMGs 20 and the central call server 18 at the main office location.
In one embodiment, the PSTN 14 includes a number of public service answering points (PSAP) 30 (shown individually as 30 a and 30 b). Switches 32 (shown individually as 32 a and 32 b) within the PSTN 14 recognize incoming emergency service calls and are configured to route those calls to an associated PSAP 30. In general, a switch 32 routes an emergency service call to a designated PSAP 30 located in the same geographic location as the switch 32. When an emergency call is placed within the PSTN 14, it first reaches a switch 32 in the general geographic area from where the call originated. In other words, when a residential consumer places an emergency 911 call over the traditional phone network, the call is first terminated at a local branch exchange where the call is recognized by the exchange as an emergency 911 call and is routed or connected to the local PSAP 30. Accordingly, the caller is routed to a local PSAP 30 which will be appropriately equipped to respond to the emergency call.
With the proliferation of VoIP networks and distributed IP telephony, the routing of emergency calls to an appropriate PSAP 30 poses a difficulty. The caller is not necessarily in the same location as the central call server 18. Accordingly, if the central call server 18 routes an emergency call to an edge gateway 16 in its local area, the PSAP 30 reached in the PSTN 14 may not be an appropriate PSAP 30 for the caller. In some cases, the PSAP 30 may be located in a different city or country from the caller.
The central call server 18 needs to be able to route an emergency service request to an appropriate region of the PSTN 14 in order for the call to reach an appropriate PSAP 30. Accordingly, the central call server 18 associates each IPMG 20 with a geographic area or zone 34 (shown individually as 34 a and 34 b). Each geographic zone 34 may include more than one IPMG 20. Similarly, the central call server 18 associates each geographic zone 34 with one or more edge gateways 16. The associations between IPMGs 20 and their corresponding geographic zones 34 may be stored as routing data in the routing database 26.
When an emergency call is placed by one of the TDM sets 22, the central call server 18 recognizes the nature of the call and the routing component 24 determines the geographic zone 34 associated with the IPMG 20 to which the TDM set 22 is connected. Based on the identified geographic zone 34 the central call server 18 selects an edge gateway 16 to which the call will be routed in order to reach the PSTN 14. It communicates the routing instructions to the IPMG 20 and the call is routed to the appropriate edge gateway 16 and into the PSTN 14. Once in the PSTN 14 it reaches a switch 32 and is routed to the local PSAP 30.
If a geographic zone 34 is associated with more than one edge gateway 16, then the routing component 24 selects one of the edge gateways 16. The selection may be based upon a number of factors including quality-of-service assessments, load balancing, or other network considerations. A geographic zone 34 may have more than one edge gateway 16 so as to provide a zone of the IP network 12 with redundant connections to the PSTN 14 for reliability and quality-of-service reasons. Accordingly, if one of the edge gateways 16 is off-line, the central call server 18 may direct the emergency call to the other edge gateway 16.
Reference is now made to FIG. 2, which shows, in flowchart form, a method 100 of routing calls from TDM sets in an IP network. The method 100 begins in step 102 wherein an IPMG receives an ESA call from a TDM set. The IPMG passes the call signalling to a central call server in step 104. In step 106, the central call server recognizes, typically based upon the digits dialed, i.e. 911, that it has received a request for emergency services from a TDM set. Accordingly, the central call server determines the geographic zone or region associated with the IPMG from which it received the call signalling. It may do so by consulting a stored set of associations in a routing database. Based upon the identity of the IPMG, the central call server is able to determine its associated geographic zone.
In step 108, the central call server uses the determined geographic zone to select an appropriate edge gateway connecting the IP network to the PSTN. The central call server may select the edge gateway from more than one appropriate candidate edge gateways. It may also test the status or loading of the candidate edge gateways to ensure that the identified edge gateway is capable to handling the ESA call and connecting the user with the PSTN.
In step 110, having identified an edge gateway, the central call server performs the functions necessary to set-up an IP trunk between the IPMG and the selected edge gateway. The IPMG is provided with routing instructions to enable it to send media packets to the edge gateway directly.
In step 112, the central call server sends call signalling information through the selected edge gateway into the PSTN in order to set-up a circuit for the call. The PSTN receives the call signalling at a local switch and routes the call to the local PSAP in step 114. Once the circuit is established between the selected edge gateway and the PSAP, the call set-up is complete and the IPMG sends media to the selected edge gateway and through to the local PSAP. The user is thus connected with his or her local PSAP in order to receive appropriate emergency services.
The present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Certain adaptations and modifications of the above described embodiments will be obvious to those skilled in the art. Therefore, the above discussed embodiments are considered to be illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (26)

1. A method of routing a call request from a time-division multiplexed (TDM) set, the TDM set being connected to an IP network through an IP media gateway, the IP network including a central call server for controlling the IP media gateway and routing calls in the IP network, the IP network including a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN), the method comprising the steps of:
receiving a signalling message at the central call server from the IP media gateway, said signalling message identifying a call from the TDM set;
identifying a geographic zone associated with the IP media gateway;
selecting one of the edge gateways based upon said geographic zone; and
sending the IP media gateway routing information for routing said call to said selected edge gateway.
2. The method claimed in claim 1, wherein the IP network includes a plurality of IP media gateways and more than one geographic zone, and wherein said method further comprises a step of associating each of the plurality of IP media gateways with one of said geographic zones.
3. The method claimed in claim 2, wherein each of said geographic zones has at least one associated edge gateway.
4. The method claimed in claim 3, wherein said step of selecting one of the edge gateways includes testing the functionality of said at least one associated edge gateway.
5. The method claimed in claim 3, wherein said central call server includes a routing database, and wherein said routing database includes said associations between each of the plurality of IP media gateways and one of said geographic zones.
6. The method claimed in claim 5, wherein said step of identifying includes reading said routing database to determine said geographic zone associated with the IP media gateway.
7. The method claimed in claim 1, wherein the IP media gateway is remote from the central call server.
8. The method claimed in claim 1, wherein the method includes a step of receiving the call request at the IP media gateway from the TDM set and composing said signalling message.
9. The method claimed in claim 1, wherein said call comprises an emergency services access call, wherein the PSTN includes a switch and a public service answering point, and wherein said selected edge gateway routes said emergency services access call to said switch, and wherein said switch routes said emergency services access call to said public service answering point.
10. The method claimed in claim 1, wherein said step of sending the IP media gateway routing information includes establishing an IP trunk between the IP media gateway and said selected edge gateway.
11. A system for routing a call request from a time-division multiplexed (TDM) set through an IP network, the IP network including a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN), the system comprising:
an IP media gateway connected to the TDM set and providing an interface to the IP network; and
a central call server for controlling said IP media gateway and routing calls in the IP network, said central call server including an input for receiving a signalling message from said IP media gateway, said signalling message identifying a call from the TDM set, and said central call server including
a component for identifying a geographic zone associated with said IP media gateway,
a component for selecting one of the edge gateways based upon said geographic zone, and
a component for sending routing information to the IP media gateway for routing said call to said selected edge gateway.
12. The system claimed in claim 11, wherein the IP network includes a plurality of IP media gateways and more than one geographic zone, and wherein said central call server includes a routing database containing routing data associating each of the plurality of IP media gateways with one of said geographic zones.
13. The system claimed in claim 12, wherein said component for identifying a geographic zone reads said routing database.
14. The system claimed in claim 12, wherein said routing data includes an association between each of said geographic zones and at least one associated edge gateway.
15. The system claimed in claim 14, wherein said component for selecting one of the edge gateways includes a component for testing the functionality of said at least one associated edge gateway.
16. The system claimed in claim 11, wherein said IP media gateway is located remote from said central call server.
17. The system claimed in claim 11, wherein said IP media gateway includes an input for receiving the call request at the IP media gateway from the TDM set and an IP messaging component for composing said signalling message.
18. The system claimed in claim 11, wherein said call comprises an emergency services access call, wherein the PSTN includes a switch a public service answering point, and wherein said selected edge gateway routes said emergency services access call to said switch, and wherein said switch routes said emergency services access call to said public service answering point.
19. The system claimed in claim 11, wherein said component for routing includes a component for establishing an IP trunk between said IP media gateway and said selected edge gateway.
20. A central call server for routing a call request from a time-division multiplexed (TDM) set through an IP network, the IP network including a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN), the IP network including an IP media gateway connected to the TDM set and providing an interface to the IP network, the central call server comprising:
an input for receiving a signalling message from said IP media gateway, said signalling message identifying a call from the TDM set;
a component for identifying a geographic zone associated with said IP media gateway;
a component for selecting one of the edge gateways based upon said geographic zone; and
a component for sending routing information to the IP media gateway for routing said call to said selected edge gateway.
21. The central call server claimed in claim 20, wherein the IP network includes a plurality of IP media gateways and more than one geographic zone, and wherein the central call server includes a routing database containing routing data associating each of the plurality of IP media gateways with one of said geographic zones.
22. The central call server claimed in claim 21, wherein said component for identifying a geographic zone reads said routing database.
23. The central call server claimed in claim 21, wherein said routing data includes an association between each of said geographic zones and at least one associated edge gateway.
24. The central call server claimed in claim 23, wherein said component for selecting one of the edge gateways includes a component for testing the functionality of said at least one associated edge gateway.
25. The central call server claimed in claim 20, wherein said call comprises an emergency services access call, wherein the PSTN includes a switch and a public service answering point, and wherein said selected edge gateway routes said emergency services access call to said switch, and wherein said switch routes said emergency services access call to said public service answering point.
26. The central call server claimed in claim 20, wherein said component for routing includes a component for establishing an IP trunk between said IP media gateway and said selected edge gateway.
US10/945,148 2004-09-20 2004-09-20 Localization of call routing for TDM sets in an IP network Active 2026-07-26 US7333480B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/945,148 US7333480B1 (en) 2004-09-20 2004-09-20 Localization of call routing for TDM sets in an IP network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/945,148 US7333480B1 (en) 2004-09-20 2004-09-20 Localization of call routing for TDM sets in an IP network

Publications (1)

Publication Number Publication Date
US7333480B1 true US7333480B1 (en) 2008-02-19

Family

ID=39059513

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/945,148 Active 2026-07-26 US7333480B1 (en) 2004-09-20 2004-09-20 Localization of call routing for TDM sets in an IP network

Country Status (1)

Country Link
US (1) US7333480B1 (en)

Cited By (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060280164A1 (en) * 2005-06-13 2006-12-14 Richard Dickinson Enhanced E911 location information using voice over internet protocol (VoIP)
US20070021125A1 (en) * 2005-07-19 2007-01-25 Yinjun Zhu Location service requests throttling
US20070041516A1 (en) * 2005-05-26 2007-02-22 Richard Dickinson E911 call blocking for non-initialized wireless telephones
US20070047692A1 (en) * 2005-08-26 2007-03-01 Richard Dickinson Emergency alert for voice over Internet protocol (VoIP)
US20070082650A1 (en) * 2005-09-26 2007-04-12 Yinjun Zhu Automatic location identification (ALI) service requests steering, connection sharing and protocol translation
US20070091906A1 (en) * 2005-10-06 2007-04-26 Jon Croy Voice over internet protocol (VoIP) location based conferencing
US20070121798A1 (en) * 2005-10-20 2007-05-31 Jon Croy Public service answering point (PSAP) proxy
US20070123271A1 (en) * 2005-08-26 2007-05-31 Richard Dickinson Cellular phone tracking scope
US20070127452A1 (en) * 2005-11-18 2007-06-07 Jon Croy Voice over Internet protocol (VoIP) mobility detection
US20070201623A1 (en) * 2006-02-24 2007-08-30 John Gordon Hines Automatic location identification (ALI) emergency services pseudo key (ESPK)
US20070202851A1 (en) * 2002-03-28 2007-08-30 Hines Gordon J Area watcher for wireless network
US20070274463A1 (en) * 2006-05-04 2007-11-29 Gerhard Geldenbott Efficient usage of emergency services keys
US20070298765A1 (en) * 2006-06-27 2007-12-27 Richard Dickinson Public services access point (PSAP) designation of preferred emergency call routing method via internet or public switched telephone network (PSTN)
US20080057975A1 (en) * 2006-08-29 2008-03-06 Gordon John Hines Consequential location derived information
US20080090546A1 (en) * 2006-10-17 2008-04-17 Richard Dickinson Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging
US20080119202A1 (en) * 2002-03-28 2008-05-22 Hines Gordon J Area watcher for wireless network
US20080119204A1 (en) * 2002-03-28 2008-05-22 Hines Gordon J Location derived presence information
US20080192731A1 (en) * 2007-02-12 2008-08-14 Richard Dickinson Mobile automatic location identification (ALI) for first responders
US7420963B1 (en) * 2003-08-29 2008-09-02 Cisco Technology, Inc. Method and apparatus for testing emergency response service in a telephony environment
US20080249796A1 (en) * 2007-02-06 2008-10-09 Croy Jonathan A Voice over internet protocol (VoIP) location based commercial prospect conferencing
US20080259908A1 (en) * 2006-09-26 2008-10-23 John Gordon Hines Location object proxy
US20080273670A1 (en) * 2007-05-02 2008-11-06 Richard Dickinson Video E911
US20090004999A1 (en) * 2003-12-19 2009-01-01 Yinjun Zhu Solutions for voice over internet protocol (VoIP) 911 location services
US20090011750A1 (en) * 2005-05-26 2009-01-08 Richard Dickinson E911 call blocking for non-initialized wireless telephones
US20090047925A1 (en) * 2003-06-24 2009-02-19 Verizon Corporate Services Group Inc. System and method for evaluating accuracy of an automatic location identification system
US20090077077A1 (en) * 2007-09-18 2009-03-19 Gerhard Geldenbott Optimal selection of MSAG address for valid civic/postal address
US20090238343A1 (en) * 2008-03-19 2009-09-24 Gerhard Geldenbott End-to-end logic tracing of complex call flows in a distributed call system
US20100069034A1 (en) * 2005-05-26 2010-03-18 Richard Dickinson E911 call blocking for non-initialized wireless telephones
US20100284366A1 (en) * 2009-05-05 2010-11-11 Yinjun Zhu Multiple location retrieval function (LRF) network having location continuity
US20110009086A1 (en) * 2009-07-10 2011-01-13 Todd Poremba Text to 9-1-1 emergency communication
US7907551B2 (en) 2005-10-06 2011-03-15 Telecommunication Systems, Inc. Voice over internet protocol (VoIP) location based 911 conferencing
US20110064046A1 (en) * 2009-09-11 2011-03-17 Yinjun Zhu User plane emergency location continuity for voice over internet protocol (VoIP)/IMS emergency services
US20110141900A1 (en) * 2009-12-11 2011-06-16 At&T Intellectual Property I, L.P. System and Method for Location, Time-of-Day, and Quality-of-Service Based Prioritized Access Control
US7966013B2 (en) 2006-11-03 2011-06-21 Telecommunication Systems, Inc. Roaming gateway enabling location based services (LBS) roaming for user plane in CDMA networks without requiring use of a mobile positioning center (MPC)
US8150363B2 (en) * 2006-02-16 2012-04-03 Telecommunication Systems, Inc. Enhanced E911 network access for call centers
US20120155479A1 (en) * 2010-12-15 2012-06-21 At&T Intellectual Property I, L.P. System for processing a call with a tdm network and routing the call with an ip network
US8208605B2 (en) 2006-05-04 2012-06-26 Telecommunication Systems, Inc. Extended efficient usage of emergency services keys
US8385964B2 (en) 2005-04-04 2013-02-26 Xone, Inc. Methods and apparatuses for geospatial-based sharing of information by multiple devices
US8467320B2 (en) 2005-10-06 2013-06-18 Telecommunication Systems, Inc. Voice over internet protocol (VoIP) multi-user conferencing
US20130225113A1 (en) * 2007-05-18 2013-08-29 Tango Networks, Inc. System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network
US8666397B2 (en) 2002-12-13 2014-03-04 Telecommunication Systems, Inc. Area event handling when current network does not cover target area
US8682321B2 (en) 2011-02-25 2014-03-25 Telecommunication Systems, Inc. Mobile internet protocol (IP) location
US8688087B2 (en) 2010-12-17 2014-04-01 Telecommunication Systems, Inc. N-dimensional affinity confluencer
US8831556B2 (en) 2011-09-30 2014-09-09 Telecommunication Systems, Inc. Unique global identifier header for minimizing prank emergency 911 calls
US8942743B2 (en) 2010-12-17 2015-01-27 Telecommunication Systems, Inc. iALERT enhanced alert manager
US8984591B2 (en) 2011-12-16 2015-03-17 Telecommunications Systems, Inc. Authentication via motion of wireless device movement
US8983047B2 (en) 2013-03-20 2015-03-17 Telecommunication Systems, Inc. Index of suspicion determination for communications request
US9088614B2 (en) 2003-12-19 2015-07-21 Telecommunications Systems, Inc. User plane location services over session initiation protocol (SIP)
US9137383B2 (en) 2011-06-17 2015-09-15 Airbus Ds Communications, Inc. Systems, apparatus, and methods for collaborative and distributed emergency multimedia data management
US9208346B2 (en) 2012-09-05 2015-12-08 Telecommunication Systems, Inc. Persona-notitia intellection codifier
US9264537B2 (en) 2011-12-05 2016-02-16 Telecommunication Systems, Inc. Special emergency call treatment based on the caller
US9301191B2 (en) 2013-09-20 2016-03-29 Telecommunication Systems, Inc. Quality of service to over the top applications used with VPN
US9307372B2 (en) 2012-03-26 2016-04-05 Telecommunication Systems, Inc. No responders online
US9313638B2 (en) 2012-08-15 2016-04-12 Telecommunication Systems, Inc. Device independent caller data access for emergency calls
US9313637B2 (en) 2011-12-05 2016-04-12 Telecommunication Systems, Inc. Wireless emergency caller profile data delivery over a legacy interface
US9338153B2 (en) 2012-04-11 2016-05-10 Telecommunication Systems, Inc. Secure distribution of non-privileged authentication credentials
US9384339B2 (en) 2012-01-13 2016-07-05 Telecommunication Systems, Inc. Authenticating cloud computing enabling secure services
US9408034B2 (en) 2013-09-09 2016-08-02 Telecommunication Systems, Inc. Extended area event for network based proximity discovery
US9456301B2 (en) 2012-12-11 2016-09-27 Telecommunication Systems, Inc. Efficient prisoner tracking
US9479897B2 (en) 2013-10-03 2016-10-25 Telecommunication Systems, Inc. SUPL-WiFi access point controller location based services for WiFi enabled mobile devices
US9479344B2 (en) 2011-09-16 2016-10-25 Telecommunication Systems, Inc. Anonymous voice conversation
US9516104B2 (en) 2013-09-11 2016-12-06 Telecommunication Systems, Inc. Intelligent load balancer enhanced routing
US9544260B2 (en) 2012-03-26 2017-01-10 Telecommunication Systems, Inc. Rapid assignment dynamic ownership queue
US9599717B2 (en) 2002-03-28 2017-03-21 Telecommunication Systems, Inc. Wireless telecommunications location based services scheme selection
US20180199180A1 (en) * 2005-08-02 2018-07-12 Qualcomm Incorporated Voip emergency call support

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030133450A1 (en) * 2002-01-08 2003-07-17 Baum Robert T. Methods and apparatus for determining the port and/or physical location of an IP device and for using that information
US20040057425A1 (en) * 2002-09-25 2004-03-25 Brouwer Wim L. Location identification for IP telephony to support emergency services
US20050190892A1 (en) * 2004-02-27 2005-09-01 Dawson Martin C. Determining the geographical location from which an emergency call originates in a packet-based communications network
US20050213716A1 (en) * 2004-03-23 2005-09-29 Yinjun Zhu Solutions for voice over internet protocol (VoIP) 911 location services
US20060188073A1 (en) * 2003-08-27 2006-08-24 Wright Ronald Paul Methods, systems and computer program products for providing a E911 network
US20060227942A1 (en) * 2004-01-30 2006-10-12 Valerie Binning Systems & methods for providing location signals/indicators when 911 dialed
US20070103317A1 (en) * 2000-06-02 2007-05-10 Zellner Samuel N Method of facilitating access to IP-based emergency services
US20070121799A1 (en) * 2004-01-30 2007-05-31 Valerie Binning Automated third party call activated when 911 dialed
US20070142060A1 (en) * 2000-12-19 2007-06-21 Bellsouth Intellectual Property Corporation Surveying wireless device users by location

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070103317A1 (en) * 2000-06-02 2007-05-10 Zellner Samuel N Method of facilitating access to IP-based emergency services
US20070142060A1 (en) * 2000-12-19 2007-06-21 Bellsouth Intellectual Property Corporation Surveying wireless device users by location
US20030133450A1 (en) * 2002-01-08 2003-07-17 Baum Robert T. Methods and apparatus for determining the port and/or physical location of an IP device and for using that information
US20040057425A1 (en) * 2002-09-25 2004-03-25 Brouwer Wim L. Location identification for IP telephony to support emergency services
US20060188073A1 (en) * 2003-08-27 2006-08-24 Wright Ronald Paul Methods, systems and computer program products for providing a E911 network
US20060227942A1 (en) * 2004-01-30 2006-10-12 Valerie Binning Systems & methods for providing location signals/indicators when 911 dialed
US20070121799A1 (en) * 2004-01-30 2007-05-31 Valerie Binning Automated third party call activated when 911 dialed
US20050190892A1 (en) * 2004-02-27 2005-09-01 Dawson Martin C. Determining the geographical location from which an emergency call originates in a packet-based communications network
US20050213716A1 (en) * 2004-03-23 2005-09-29 Yinjun Zhu Solutions for voice over internet protocol (VoIP) 911 location services

Cited By (164)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9220958B2 (en) 2002-03-28 2015-12-29 Telecommunications Systems, Inc. Consequential location derived information
US20070202851A1 (en) * 2002-03-28 2007-08-30 Hines Gordon J Area watcher for wireless network
US8983048B2 (en) 2002-03-28 2015-03-17 Telecommunication Systems, Inc. Location derived presence information
US9154906B2 (en) 2002-03-28 2015-10-06 Telecommunication Systems, Inc. Area watcher for wireless network
US20080119204A1 (en) * 2002-03-28 2008-05-22 Hines Gordon J Location derived presence information
US7856236B2 (en) 2002-03-28 2010-12-21 Telecommunication Systems, Inc. Area watcher for wireless network
US9602968B2 (en) 2002-03-28 2017-03-21 Telecommunication Systems, Inc. Area watcher for wireless network
US9398419B2 (en) 2002-03-28 2016-07-19 Telecommunication Systems, Inc. Location derived presence information
US20080119202A1 (en) * 2002-03-28 2008-05-22 Hines Gordon J Area watcher for wireless network
US8032112B2 (en) 2002-03-28 2011-10-04 Telecommunication Systems, Inc. Location derived presence information
US9599717B2 (en) 2002-03-28 2017-03-21 Telecommunication Systems, Inc. Wireless telecommunications location based services scheme selection
US8532277B2 (en) 2002-03-28 2013-09-10 Telecommunication Systems, Inc. Location derived presence information
US8666397B2 (en) 2002-12-13 2014-03-04 Telecommunication Systems, Inc. Area event handling when current network does not cover target area
US20090047925A1 (en) * 2003-06-24 2009-02-19 Verizon Corporate Services Group Inc. System and method for evaluating accuracy of an automatic location identification system
US7920876B2 (en) * 2003-06-24 2011-04-05 Verizon Corporate Services Group Inc. System and method for evaluating accuracy of an automatic location identification system
US7979496B2 (en) 2003-08-29 2011-07-12 Cisco Technology, Inc. Method and apparatus for measuring health and performance of a messaging system
US7420963B1 (en) * 2003-08-29 2008-09-02 Cisco Technology, Inc. Method and apparatus for testing emergency response service in a telephony environment
US20080215696A1 (en) * 2003-08-29 2008-09-04 Jagannathan Shiva Shankar Method and apparatus for measuring health and performance of a messaging system
US8385881B2 (en) 2003-12-19 2013-02-26 Telecommunication Systems, Inc. Solutions for voice over internet protocol (VoIP) 911 location services
US8369825B2 (en) 2003-12-19 2013-02-05 Telecommunication Systems, Inc. Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging
US9467836B2 (en) 2003-12-19 2016-10-11 Telecommunication Systems, Inc. Enhanced E911 location information using voice over internet protocol (VoIP)
US8873718B2 (en) 2003-12-19 2014-10-28 Telecommunication Systems, Inc. Enhanced E911 location information using voice over internet protocol (VoIP)
US9088614B2 (en) 2003-12-19 2015-07-21 Telecommunications Systems, Inc. User plane location services over session initiation protocol (SIP)
US20110149851A1 (en) * 2003-12-19 2011-06-23 Richard Dickinson Enhanced E911 location information using voice over internet protocol (VoIP)
US20090004999A1 (en) * 2003-12-19 2009-01-01 Yinjun Zhu Solutions for voice over internet protocol (VoIP) 911 location services
US9197992B2 (en) 2003-12-19 2015-11-24 Telecommunication Systems, Inc. User plane location services over session initiation protocol (SIP)
US9125039B2 (en) 2003-12-19 2015-09-01 Telecommunication Systems, Inc. Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging
US7912446B2 (en) 2003-12-19 2011-03-22 Telecommunication Systems, Inc. Solutions for voice over internet protocol (VoIP) 911 location services
US10341809B2 (en) 2005-04-04 2019-07-02 X One, Inc. Location sharing with facilitated meeting point definition
US10791414B2 (en) 2005-04-04 2020-09-29 X One, Inc. Location sharing for commercial and proprietary content applications
US9031581B1 (en) 2005-04-04 2015-05-12 X One, Inc. Apparatus and method for obtaining content on a cellular wireless device based on proximity to other wireless devices
US9167558B2 (en) 2005-04-04 2015-10-20 X One, Inc. Methods and systems for sharing position data between subscribers involving multiple wireless providers
US10299071B2 (en) 2005-04-04 2019-05-21 X One, Inc. Server-implemented methods and systems for sharing location amongst web-enabled cell phones
US10165059B2 (en) 2005-04-04 2018-12-25 X One, Inc. Methods, systems and apparatuses for the formation and tracking of location sharing groups
US9185522B1 (en) 2005-04-04 2015-11-10 X One, Inc. Apparatus and method to transmit content to a cellular wireless device based on proximity to other wireless devices
US9253616B1 (en) 2005-04-04 2016-02-02 X One, Inc. Apparatus and method for obtaining content on a cellular wireless device based on proximity
US8831635B2 (en) 2005-04-04 2014-09-09 X One, Inc. Methods and apparatuses for transmission of an alert to multiple devices
US10149092B1 (en) 2005-04-04 2018-12-04 X One, Inc. Location sharing service between GPS-enabled wireless devices, with shared target location exchange
US10313826B2 (en) 2005-04-04 2019-06-04 X One, Inc. Location sharing and map support in connection with services request
US8798645B2 (en) 2005-04-04 2014-08-05 X One, Inc. Methods and systems for sharing position data and tracing paths between mobile-device users
US8798647B1 (en) 2005-04-04 2014-08-05 X One, Inc. Tracking proximity of services provider to services consumer
US8798593B2 (en) 2005-04-04 2014-08-05 X One, Inc. Location sharing and tracking using mobile phones or other wireless devices
US9967704B1 (en) 2005-04-04 2018-05-08 X One, Inc. Location sharing group map management
US10341808B2 (en) 2005-04-04 2019-07-02 X One, Inc. Location sharing for commercial and proprietary content applications
US8750898B2 (en) 2005-04-04 2014-06-10 X One, Inc. Methods and systems for annotating target locations
US10750310B2 (en) 2005-04-04 2020-08-18 X One, Inc. Temporary location sharing group with event based termination
US9955298B1 (en) 2005-04-04 2018-04-24 X One, Inc. Methods, systems and apparatuses for the formation and tracking of location sharing groups
US9942705B1 (en) 2005-04-04 2018-04-10 X One, Inc. Location sharing group for services provision
US8712441B2 (en) 2005-04-04 2014-04-29 Xone, Inc. Methods and systems for temporarily sharing position data between mobile-device users
US11778415B2 (en) 2005-04-04 2023-10-03 Xone, Inc. Location sharing application in association with services provision
US9883360B1 (en) 2005-04-04 2018-01-30 X One, Inc. Rendez vous management using mobile phones or other mobile devices
US8538458B2 (en) 2005-04-04 2013-09-17 X One, Inc. Location sharing and tracking using mobile phones or other wireless devices
US9854394B1 (en) 2005-04-04 2017-12-26 X One, Inc. Ad hoc location sharing group between first and second cellular wireless devices
US9854402B1 (en) 2005-04-04 2017-12-26 X One, Inc. Formation of wireless device location sharing group
US9749790B1 (en) 2005-04-04 2017-08-29 X One, Inc. Rendez vous management using mobile phones or other mobile devices
US9736618B1 (en) 2005-04-04 2017-08-15 X One, Inc. Techniques for sharing relative position between mobile devices
US9654921B1 (en) 2005-04-04 2017-05-16 X One, Inc. Techniques for sharing position data between first and second devices
US9615204B1 (en) 2005-04-04 2017-04-04 X One, Inc. Techniques for communication within closed groups of mobile devices
US10750311B2 (en) 2005-04-04 2020-08-18 X One, Inc. Application-based tracking and mapping function in connection with vehicle-based services provision
US8385964B2 (en) 2005-04-04 2013-02-26 Xone, Inc. Methods and apparatuses for geospatial-based sharing of information by multiple devices
US10750309B2 (en) 2005-04-04 2020-08-18 X One, Inc. Ad hoc location sharing group establishment for wireless devices with designated meeting point
US10200811B1 (en) 2005-04-04 2019-02-05 X One, Inc. Map presentation on cellular device showing positions of multiple other wireless device users
US9467832B2 (en) 2005-04-04 2016-10-11 X One, Inc. Methods and systems for temporarily sharing position data between mobile-device users
US10856099B2 (en) 2005-04-04 2020-12-01 X One, Inc. Application-based two-way tracking and mapping function with selected individuals
US9584960B1 (en) 2005-04-04 2017-02-28 X One, Inc. Rendez vous management using mobile phones or other mobile devices
US11356799B2 (en) 2005-04-04 2022-06-07 X One, Inc. Fleet location sharing application in association with services provision
US8103242B2 (en) 2005-05-26 2012-01-24 Telecommunication Systems, Inc. E911 call blocking for non-initialized wireless telephones
US8175570B2 (en) 2005-05-26 2012-05-08 Telecommunication Systems, Inc. E911 call blocking for non-initialized wireless telephones
US8116722B2 (en) 2005-05-26 2012-02-14 Telecommunication Systems, Inc. E911 call blocking for non-initialized wireless telephones
US20100069034A1 (en) * 2005-05-26 2010-03-18 Richard Dickinson E911 call blocking for non-initialized wireless telephones
US20070041516A1 (en) * 2005-05-26 2007-02-22 Richard Dickinson E911 call blocking for non-initialized wireless telephones
US20090011750A1 (en) * 2005-05-26 2009-01-08 Richard Dickinson E911 call blocking for non-initialized wireless telephones
US20060280164A1 (en) * 2005-06-13 2006-12-14 Richard Dickinson Enhanced E911 location information using voice over internet protocol (VoIP)
US7903791B2 (en) 2005-06-13 2011-03-08 Telecommunication Systems, Inc. Enhanced E911 location information using voice over internet protocol (VoIP)
US20070021125A1 (en) * 2005-07-19 2007-01-25 Yinjun Zhu Location service requests throttling
US8660573B2 (en) 2005-07-19 2014-02-25 Telecommunications Systems, Inc. Location service requests throttling
US9288615B2 (en) 2005-07-19 2016-03-15 Telecommunication Systems, Inc. Location service requests throttling
US10708748B2 (en) * 2005-08-02 2020-07-07 Qualcomm Incorporated VoIP emergency call support
US20180199180A1 (en) * 2005-08-02 2018-07-12 Qualcomm Incorporated Voip emergency call support
US10178522B2 (en) 2005-08-02 2019-01-08 Qualcomm Incorporated VoIP emergency call support
US20070123271A1 (en) * 2005-08-26 2007-05-31 Richard Dickinson Cellular phone tracking scope
US7933385B2 (en) 2005-08-26 2011-04-26 Telecommunication Systems, Inc. Emergency alert for voice over internet protocol (VoIP)
US9390615B2 (en) 2005-08-26 2016-07-12 Telecommunication Systems, Inc. Emergency alert for voice over internet protocol (VoIP)
US20110019664A1 (en) * 2005-08-26 2011-01-27 Richard Dickinson Emergency alert for voice over internet protocol (VoIP)
US20070047692A1 (en) * 2005-08-26 2007-03-01 Richard Dickinson Emergency alert for voice over Internet protocol (VoIP)
US9282451B2 (en) 2005-09-26 2016-03-08 Telecommunication Systems, Inc. Automatic location identification (ALI) service requests steering, connection sharing and protocol translation
US20070082650A1 (en) * 2005-09-26 2007-04-12 Yinjun Zhu Automatic location identification (ALI) service requests steering, connection sharing and protocol translation
US7907551B2 (en) 2005-10-06 2011-03-15 Telecommunication Systems, Inc. Voice over internet protocol (VoIP) location based 911 conferencing
US8467320B2 (en) 2005-10-06 2013-06-18 Telecommunication Systems, Inc. Voice over internet protocol (VoIP) multi-user conferencing
US20070091906A1 (en) * 2005-10-06 2007-04-26 Jon Croy Voice over internet protocol (VoIP) location based conferencing
US20070121798A1 (en) * 2005-10-20 2007-05-31 Jon Croy Public service answering point (PSAP) proxy
US9258386B2 (en) 2005-11-18 2016-02-09 Telecommunication Systems, Inc. Voice over internet protocol (VoIP) mobility detection
US20070127452A1 (en) * 2005-11-18 2007-06-07 Jon Croy Voice over Internet protocol (VoIP) mobility detection
US9420444B2 (en) 2006-02-16 2016-08-16 Telecommunication Systems, Inc. Enhanced E911 network access for call centers
US8150363B2 (en) * 2006-02-16 2012-04-03 Telecommunication Systems, Inc. Enhanced E911 network access for call centers
US8406728B2 (en) 2006-02-16 2013-03-26 Telecommunication Systems, Inc. Enhanced E911 network access for call centers
US20070201623A1 (en) * 2006-02-24 2007-08-30 John Gordon Hines Automatic location identification (ALI) emergency services pseudo key (ESPK)
US8059789B2 (en) 2006-02-24 2011-11-15 Telecommunication Systems, Inc. Automatic location identification (ALI) emergency services pseudo key (ESPK)
US8208605B2 (en) 2006-05-04 2012-06-26 Telecommunication Systems, Inc. Extended efficient usage of emergency services keys
US9584661B2 (en) 2006-05-04 2017-02-28 Telecommunication Systems, Inc. Extended efficient usage of emergency services keys
US8532266B2 (en) 2006-05-04 2013-09-10 Telecommunication Systems, Inc. Efficient usage of emergency services keys
US8885796B2 (en) 2006-05-04 2014-11-11 Telecommunications Systems, Inc. Extended efficient usage of emergency services keys
US20070274463A1 (en) * 2006-05-04 2007-11-29 Gerhard Geldenbott Efficient usage of emergency services keys
US20070298765A1 (en) * 2006-06-27 2007-12-27 Richard Dickinson Public services access point (PSAP) designation of preferred emergency call routing method via internet or public switched telephone network (PSTN)
US8290505B2 (en) 2006-08-29 2012-10-16 Telecommunications Systems, Inc. Consequential location derived information
US20080057975A1 (en) * 2006-08-29 2008-03-06 Gordon John Hines Consequential location derived information
US20080259908A1 (en) * 2006-09-26 2008-10-23 John Gordon Hines Location object proxy
US20080267172A1 (en) * 2006-09-26 2008-10-30 Hines John G Location object proxy broker
US20080090546A1 (en) * 2006-10-17 2008-04-17 Richard Dickinson Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging
US7966013B2 (en) 2006-11-03 2011-06-21 Telecommunication Systems, Inc. Roaming gateway enabling location based services (LBS) roaming for user plane in CDMA networks without requiring use of a mobile positioning center (MPC)
US8190151B2 (en) 2006-11-03 2012-05-29 Telecommunication Systems, Inc. Roaming gateway enabling location based services (LBS) roaming for user plane in CDMA networks without requiring use of a mobile positioning center (MPC)
US20080249796A1 (en) * 2007-02-06 2008-10-09 Croy Jonathan A Voice over internet protocol (VoIP) location based commercial prospect conferencing
US8050386B2 (en) 2007-02-12 2011-11-01 Telecommunication Systems, Inc. Mobile automatic location identification (ALI) for first responders
US20080192731A1 (en) * 2007-02-12 2008-08-14 Richard Dickinson Mobile automatic location identification (ALI) for first responders
US8520805B2 (en) 2007-05-02 2013-08-27 Telecommunication Systems, Inc. Video E911
US20080273670A1 (en) * 2007-05-02 2008-11-06 Richard Dickinson Video E911
US11659471B2 (en) 2007-05-18 2023-05-23 Tango Networks, Inc. System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network
US8942664B2 (en) * 2007-05-18 2015-01-27 Tango Networks, Inc. System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network
US8634800B2 (en) * 2007-05-18 2014-01-21 Tango Networks, Inc. System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network
US10820255B2 (en) 2007-05-18 2020-10-27 Tango Networks, Inc. System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network
US20130225113A1 (en) * 2007-05-18 2013-08-29 Tango Networks, Inc. System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network
US20140106701A1 (en) * 2007-05-18 2014-04-17 Tango Networks, Inc. System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network
US20090077077A1 (en) * 2007-09-18 2009-03-19 Gerhard Geldenbott Optimal selection of MSAG address for valid civic/postal address
US9413889B2 (en) 2007-09-18 2016-08-09 Telecommunication Systems, Inc. House number normalization for master street address guide (MSAG) address matching
US20090092232A1 (en) * 2007-09-18 2009-04-09 Gerhard Geldenbott House number normalization for master street address guide (MSAG) address matching
US8576991B2 (en) 2008-03-19 2013-11-05 Telecommunication Systems, Inc. End-to-end logic tracing of complex call flows in a distributed call system
US20090238343A1 (en) * 2008-03-19 2009-09-24 Gerhard Geldenbott End-to-end logic tracing of complex call flows in a distributed call system
US8867485B2 (en) 2009-05-05 2014-10-21 Telecommunication Systems, Inc. Multiple location retrieval function (LRF) network having location continuity
US20100284366A1 (en) * 2009-05-05 2010-11-11 Yinjun Zhu Multiple location retrieval function (LRF) network having location continuity
US20110009086A1 (en) * 2009-07-10 2011-01-13 Todd Poremba Text to 9-1-1 emergency communication
US20110064046A1 (en) * 2009-09-11 2011-03-17 Yinjun Zhu User plane emergency location continuity for voice over internet protocol (VoIP)/IMS emergency services
US8644159B2 (en) * 2009-12-11 2014-02-04 At&T Intellectual Property I, L.P. System and method for location, time-of-day, and quality-of-service based prioritized access control
US20110141900A1 (en) * 2009-12-11 2011-06-16 At&T Intellectual Property I, L.P. System and Method for Location, Time-of-Day, and Quality-of-Service Based Prioritized Access Control
US20120291128A1 (en) * 2009-12-11 2012-11-15 At&T Intellectual Property I, L.P. System and Method for Location, Time-of-Day, and Quality-of-Service Based Prioritized Access Control
US8254257B2 (en) 2009-12-11 2012-08-28 At&T Intellectual Property I, Lp System and method for location, time-of-day, and quality-of-service based prioritized access control
US8611360B2 (en) * 2010-12-15 2013-12-17 At&T Intellectual Property I, L.P. System for processing a call with a TDM network and routing the call with an IP network
US20120155479A1 (en) * 2010-12-15 2012-06-21 At&T Intellectual Property I, L.P. System for processing a call with a tdm network and routing the call with an ip network
US8688087B2 (en) 2010-12-17 2014-04-01 Telecommunication Systems, Inc. N-dimensional affinity confluencer
US9210548B2 (en) 2010-12-17 2015-12-08 Telecommunication Systems, Inc. iALERT enhanced alert manager
US8942743B2 (en) 2010-12-17 2015-01-27 Telecommunication Systems, Inc. iALERT enhanced alert manager
US8682321B2 (en) 2011-02-25 2014-03-25 Telecommunication Systems, Inc. Mobile internet protocol (IP) location
US9173059B2 (en) 2011-02-25 2015-10-27 Telecommunication Systems, Inc. Mobile internet protocol (IP) location
US9509842B2 (en) 2011-06-17 2016-11-29 Airbus Ds Communications, Inc. Collaborative and distributed emergency multimedia data management
US9137383B2 (en) 2011-06-17 2015-09-15 Airbus Ds Communications, Inc. Systems, apparatus, and methods for collaborative and distributed emergency multimedia data management
US9479344B2 (en) 2011-09-16 2016-10-25 Telecommunication Systems, Inc. Anonymous voice conversation
US9178996B2 (en) 2011-09-30 2015-11-03 Telecommunication Systems, Inc. Unique global identifier header for minimizing prank 911 calls
US8831556B2 (en) 2011-09-30 2014-09-09 Telecommunication Systems, Inc. Unique global identifier header for minimizing prank emergency 911 calls
US9401986B2 (en) 2011-09-30 2016-07-26 Telecommunication Systems, Inc. Unique global identifier header for minimizing prank emergency 911 calls
US9313637B2 (en) 2011-12-05 2016-04-12 Telecommunication Systems, Inc. Wireless emergency caller profile data delivery over a legacy interface
US9264537B2 (en) 2011-12-05 2016-02-16 Telecommunication Systems, Inc. Special emergency call treatment based on the caller
US8984591B2 (en) 2011-12-16 2015-03-17 Telecommunications Systems, Inc. Authentication via motion of wireless device movement
US9326143B2 (en) 2011-12-16 2016-04-26 Telecommunication Systems, Inc. Authentication via motion of wireless device movement
US9384339B2 (en) 2012-01-13 2016-07-05 Telecommunication Systems, Inc. Authenticating cloud computing enabling secure services
US9307372B2 (en) 2012-03-26 2016-04-05 Telecommunication Systems, Inc. No responders online
US9544260B2 (en) 2012-03-26 2017-01-10 Telecommunication Systems, Inc. Rapid assignment dynamic ownership queue
US9338153B2 (en) 2012-04-11 2016-05-10 Telecommunication Systems, Inc. Secure distribution of non-privileged authentication credentials
US9313638B2 (en) 2012-08-15 2016-04-12 Telecommunication Systems, Inc. Device independent caller data access for emergency calls
US9208346B2 (en) 2012-09-05 2015-12-08 Telecommunication Systems, Inc. Persona-notitia intellection codifier
US9456301B2 (en) 2012-12-11 2016-09-27 Telecommunication Systems, Inc. Efficient prisoner tracking
US8983047B2 (en) 2013-03-20 2015-03-17 Telecommunication Systems, Inc. Index of suspicion determination for communications request
US9408034B2 (en) 2013-09-09 2016-08-02 Telecommunication Systems, Inc. Extended area event for network based proximity discovery
US9516104B2 (en) 2013-09-11 2016-12-06 Telecommunication Systems, Inc. Intelligent load balancer enhanced routing
US9301191B2 (en) 2013-09-20 2016-03-29 Telecommunication Systems, Inc. Quality of service to over the top applications used with VPN
US9479897B2 (en) 2013-10-03 2016-10-25 Telecommunication Systems, Inc. SUPL-WiFi access point controller location based services for WiFi enabled mobile devices

Similar Documents

Publication Publication Date Title
US7333480B1 (en) Localization of call routing for TDM sets in an IP network
RU2141734C1 (en) Mobile communication network
US7330464B2 (en) Location identification for IP telephony to support emergency services
CN100508660C (en) Dropped call continuation
US8532630B2 (en) Unstructured supplementary service data application within a wireless network
US20070003024A1 (en) Network emergency call taking system and method
US7408925B1 (en) Originator based directing and origination call processing features for external devices
US20060168326A1 (en) Dial plan transparency for fragmented networks
US20070298771A1 (en) Method And Device For Routing Communications In Cellular Communications Network
US7706802B2 (en) Media gateway interconnect routing in a softswitch environment
JP2006191615A (en) Alternative path selection for media connection in single communication system between public or private net facilities
KR20060044612A (en) Caller originated multiple calling
US8532629B2 (en) Unstructured supplementary service data call control manager within a wireless network
US6882722B2 (en) Virtual private communications network
RU2295201C1 (en) Method and system for routing calls in inter-network interface for transferring speech via internet protocol (voip)
CN101945187A (en) Method and system for bonding fixed-line extension telephones and mobile terminals
US7133514B1 (en) Premise-based voice bridge extension
US20030227922A1 (en) Method for alternate routing of communication connections
US8315359B2 (en) Method and system for enabling emergency calling from nomadic VoIP extension telephones
KR101511780B1 (en) Reduction of wireless communication costs in enterprises
US20040052350A1 (en) System and method for delivering enhanced voice and data services in parallel with an incumbent phone company
JP2011151434A (en) Communication system and communication method for providing service provider selected service
US7551733B2 (en) Methods and devices for establishing an area party line service for telephone calls
US9106755B2 (en) Method and system for a gateway transfer
CN101554003A (en) System and method for providing RSVP reservations in a shared line environment

Legal Events

Date Code Title Description
AS Assignment

Owner name: NORTEL NETWORKS LIMITED, CANADA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CLARKE, GWEN;CHEUNG, CUTHBERT;TARIE, PETER;AND OTHERS;REEL/FRAME:015818/0049

Effective date: 20040916

AS Assignment

Owner name: NORTEL NETWORKS LIMITED, CANADA

Free format text: RE-RECORD TO CORRECT THE ASSIGNOR NAME PREVIOUSLY RECORDED AT REEL/FRAME 015818/0049;ASSIGNORS:CLARKE, GWEN;CHEUNG, CUTHBERT;TARLE, PETER;AND OTHERS;REEL/FRAME:016506/0402

Effective date: 20040916

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

AS Assignment

Owner name: CITIBANK, N.A., AS ADMINISTRATIVE AGENT,NEW YORK

Free format text: SECURITY AGREEMENT;ASSIGNOR:AVAYA INC.;REEL/FRAME:023892/0500

Effective date: 20100129

Owner name: CITIBANK, N.A., AS ADMINISTRATIVE AGENT, NEW YORK

Free format text: SECURITY AGREEMENT;ASSIGNOR:AVAYA INC.;REEL/FRAME:023892/0500

Effective date: 20100129

AS Assignment

Owner name: CITICORP USA, INC., AS ADMINISTRATIVE AGENT, NEW YORK

Free format text: SECURITY AGREEMENT;ASSIGNOR:AVAYA INC.;REEL/FRAME:023905/0001

Effective date: 20100129

Owner name: CITICORP USA, INC., AS ADMINISTRATIVE AGENT,NEW YO

Free format text: SECURITY AGREEMENT;ASSIGNOR:AVAYA INC.;REEL/FRAME:023905/0001

Effective date: 20100129

Owner name: CITICORP USA, INC., AS ADMINISTRATIVE AGENT, NEW Y

Free format text: SECURITY AGREEMENT;ASSIGNOR:AVAYA INC.;REEL/FRAME:023905/0001

Effective date: 20100129

AS Assignment

Owner name: AVAYA INC.,NEW JERSEY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NORTEL NETWORKS LIMITED;REEL/FRAME:023998/0878

Effective date: 20091218

Owner name: AVAYA INC., NEW JERSEY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NORTEL NETWORKS LIMITED;REEL/FRAME:023998/0878

Effective date: 20091218

AS Assignment

Owner name: BANK OF NEW YORK MELLON TRUST, NA, AS NOTES COLLATERAL AGENT, THE, PENNSYLVANIA

Free format text: SECURITY AGREEMENT;ASSIGNOR:AVAYA INC., A DELAWARE CORPORATION;REEL/FRAME:025863/0535

Effective date: 20110211

Owner name: BANK OF NEW YORK MELLON TRUST, NA, AS NOTES COLLAT

Free format text: SECURITY AGREEMENT;ASSIGNOR:AVAYA INC., A DELAWARE CORPORATION;REEL/FRAME:025863/0535

Effective date: 20110211

FPAY Fee payment

Year of fee payment: 4

AS Assignment

Owner name: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., THE, PENNSYLVANIA

Free format text: SECURITY AGREEMENT;ASSIGNOR:AVAYA, INC.;REEL/FRAME:030083/0639

Effective date: 20130307

Owner name: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., THE,

Free format text: SECURITY AGREEMENT;ASSIGNOR:AVAYA, INC.;REEL/FRAME:030083/0639

Effective date: 20130307

FPAY Fee payment

Year of fee payment: 8

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

AS Assignment

Owner name: CITIBANK, N.A., AS ADMINISTRATIVE AGENT, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNORS:AVAYA INC.;AVAYA INTEGRATED CABINET SOLUTIONS INC.;OCTEL COMMUNICATIONS CORPORATION;AND OTHERS;REEL/FRAME:041576/0001

Effective date: 20170124

AS Assignment

Owner name: AVAYA INTEGRATED CABINET SOLUTIONS INC., CALIFORNIA

Free format text: BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 041576/0001;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:044893/0531

Effective date: 20171128

Owner name: OCTEL COMMUNICATIONS LLC (FORMERLY KNOWN AS OCTEL COMMUNICATIONS CORPORATION), CALIFORNIA

Free format text: BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 041576/0001;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:044893/0531

Effective date: 20171128

Owner name: AVAYA INC., CALIFORNIA

Free format text: BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 023892/0500;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:044891/0564

Effective date: 20171128

Owner name: AVAYA INC., CALIFORNIA

Free format text: BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 025863/0535;ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST, NA;REEL/FRAME:044892/0001

Effective date: 20171128

Owner name: OCTEL COMMUNICATIONS LLC (FORMERLY KNOWN AS OCTEL

Free format text: BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 041576/0001;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:044893/0531

Effective date: 20171128

Owner name: AVAYA INC., CALIFORNIA

Free format text: BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 041576/0001;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:044893/0531

Effective date: 20171128

Owner name: VPNET TECHNOLOGIES, INC., CALIFORNIA

Free format text: BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 041576/0001;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:044893/0531

Effective date: 20171128

Owner name: AVAYA INTEGRATED CABINET SOLUTIONS INC., CALIFORNI

Free format text: BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 041576/0001;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:044893/0531

Effective date: 20171128

Owner name: AVAYA INC., CALIFORNIA

Free format text: BANKRUPTCY COURT ORDER RELEASING ALL LIENS INCLUDING THE SECURITY INTEREST RECORDED AT REEL/FRAME 030083/0639;ASSIGNOR:THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.;REEL/FRAME:045012/0666

Effective date: 20171128

AS Assignment

Owner name: GOLDMAN SACHS BANK USA, AS COLLATERAL AGENT, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNORS:AVAYA INC.;AVAYA INTEGRATED CABINET SOLUTIONS LLC;OCTEL COMMUNICATIONS LLC;AND OTHERS;REEL/FRAME:045034/0001

Effective date: 20171215

Owner name: GOLDMAN SACHS BANK USA, AS COLLATERAL AGENT, NEW Y

Free format text: SECURITY INTEREST;ASSIGNORS:AVAYA INC.;AVAYA INTEGRATED CABINET SOLUTIONS LLC;OCTEL COMMUNICATIONS LLC;AND OTHERS;REEL/FRAME:045034/0001

Effective date: 20171215

AS Assignment

Owner name: AVAYA, INC., CALIFORNIA

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CITICORP USA, INC.;REEL/FRAME:045045/0564

Effective date: 20171215

Owner name: SIERRA HOLDINGS CORP., NEW JERSEY

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CITICORP USA, INC.;REEL/FRAME:045045/0564

Effective date: 20171215

AS Assignment

Owner name: CITIBANK, N.A., AS COLLATERAL AGENT, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNORS:AVAYA INC.;AVAYA INTEGRATED CABINET SOLUTIONS LLC;OCTEL COMMUNICATIONS LLC;AND OTHERS;REEL/FRAME:045124/0026

Effective date: 20171215

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 12

AS Assignment

Owner name: WILMINGTON TRUST, NATIONAL ASSOCIATION, MINNESOTA

Free format text: SECURITY INTEREST;ASSIGNORS:AVAYA INC.;AVAYA MANAGEMENT L.P.;INTELLISIST, INC.;AND OTHERS;REEL/FRAME:053955/0436

Effective date: 20200925

AS Assignment

Owner name: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT, DELAWARE

Free format text: INTELLECTUAL PROPERTY SECURITY AGREEMENT;ASSIGNORS:AVAYA INC.;INTELLISIST, INC.;AVAYA MANAGEMENT L.P.;AND OTHERS;REEL/FRAME:061087/0386

Effective date: 20220712

AS Assignment

Owner name: AVAYA INTEGRATED CABINET SOLUTIONS LLC, NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS AT REEL 45124/FRAME 0026;ASSIGNOR:CITIBANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:063457/0001

Effective date: 20230403

Owner name: AVAYA MANAGEMENT L.P., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS AT REEL 45124/FRAME 0026;ASSIGNOR:CITIBANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:063457/0001

Effective date: 20230403

Owner name: AVAYA INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS AT REEL 45124/FRAME 0026;ASSIGNOR:CITIBANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:063457/0001

Effective date: 20230403

Owner name: AVAYA HOLDINGS CORP., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS AT REEL 45124/FRAME 0026;ASSIGNOR:CITIBANK, N.A., AS COLLATERAL AGENT;REEL/FRAME:063457/0001

Effective date: 20230403

AS Assignment

Owner name: WILMINGTON SAVINGS FUND SOCIETY, FSB (COLLATERAL AGENT), DELAWARE

Free format text: INTELLECTUAL PROPERTY SECURITY AGREEMENT;ASSIGNORS:AVAYA MANAGEMENT L.P.;AVAYA INC.;INTELLISIST, INC.;AND OTHERS;REEL/FRAME:063742/0001

Effective date: 20230501

AS Assignment

Owner name: CITIBANK, N.A., AS COLLATERAL AGENT, NEW YORK

Free format text: INTELLECTUAL PROPERTY SECURITY AGREEMENT;ASSIGNORS:AVAYA INC.;AVAYA MANAGEMENT L.P.;INTELLISIST, INC.;REEL/FRAME:063542/0662

Effective date: 20230501

AS Assignment

Owner name: AVAYA MANAGEMENT L.P., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: CAAS TECHNOLOGIES, LLC, NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: HYPERQUALITY II, LLC, NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: HYPERQUALITY, INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: ZANG, INC. (FORMER NAME OF AVAYA CLOUD INC.), NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: VPNET TECHNOLOGIES, INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: OCTEL COMMUNICATIONS LLC, NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: AVAYA INTEGRATED CABINET SOLUTIONS LLC, NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: INTELLISIST, INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: AVAYA INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 045034/0001);ASSIGNOR:GOLDMAN SACHS BANK USA., AS COLLATERAL AGENT;REEL/FRAME:063779/0622

Effective date: 20230501

Owner name: AVAYA INTEGRATED CABINET SOLUTIONS LLC, NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 53955/0436);ASSIGNOR:WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT;REEL/FRAME:063705/0023

Effective date: 20230501

Owner name: INTELLISIST, INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 53955/0436);ASSIGNOR:WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT;REEL/FRAME:063705/0023

Effective date: 20230501

Owner name: AVAYA INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 53955/0436);ASSIGNOR:WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT;REEL/FRAME:063705/0023

Effective date: 20230501

Owner name: AVAYA MANAGEMENT L.P., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 53955/0436);ASSIGNOR:WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT;REEL/FRAME:063705/0023

Effective date: 20230501

Owner name: AVAYA INTEGRATED CABINET SOLUTIONS LLC, NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 61087/0386);ASSIGNOR:WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT;REEL/FRAME:063690/0359

Effective date: 20230501

Owner name: INTELLISIST, INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 61087/0386);ASSIGNOR:WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT;REEL/FRAME:063690/0359

Effective date: 20230501

Owner name: AVAYA INC., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 61087/0386);ASSIGNOR:WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT;REEL/FRAME:063690/0359

Effective date: 20230501

Owner name: AVAYA MANAGEMENT L.P., NEW JERSEY

Free format text: RELEASE OF SECURITY INTEREST IN PATENTS (REEL/FRAME 61087/0386);ASSIGNOR:WILMINGTON TRUST, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT;REEL/FRAME:063690/0359

Effective date: 20230501

AS Assignment

Owner name: AVAYA LLC, DELAWARE

Free format text: (SECURITY INTEREST) GRANTOR'S NAME CHANGE;ASSIGNOR:AVAYA INC.;REEL/FRAME:065019/0231

Effective date: 20230501

AS Assignment

Owner name: AVAYA MANAGEMENT L.P., NEW JERSEY

Free format text: INTELLECTUAL PROPERTY RELEASE AND REASSIGNMENT;ASSIGNOR:WILMINGTON SAVINGS FUND SOCIETY, FSB;REEL/FRAME:066894/0227

Effective date: 20240325

Owner name: AVAYA LLC, DELAWARE

Free format text: INTELLECTUAL PROPERTY RELEASE AND REASSIGNMENT;ASSIGNOR:WILMINGTON SAVINGS FUND SOCIETY, FSB;REEL/FRAME:066894/0227

Effective date: 20240325

Owner name: AVAYA MANAGEMENT L.P., NEW JERSEY

Free format text: INTELLECTUAL PROPERTY RELEASE AND REASSIGNMENT;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:066894/0117

Effective date: 20240325

Owner name: AVAYA LLC, DELAWARE

Free format text: INTELLECTUAL PROPERTY RELEASE AND REASSIGNMENT;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:066894/0117

Effective date: 20240325